21621612535034 has 16 divisors (see below), whose sum is σ = 32754764067840. Its totient is φ = 10703365899600.

The previous prime is 21621612535021. The next prime is 21621612535087. The reversal of 21621612535034 is 43053521612612.

It is a junction number, because it is equal to n+sod(n) for n = 21621612534982 and 21621612535000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3405287 + ... + 7405349.

It is an arithmetic number, because the mean of its divisors is an integer number (2047172754240).

Almost surely, 2^{21621612535034} is an apocalyptic number.

21621612535034 is a deficient number, since it is larger than the sum of its proper divisors (11133151532806).

21621612535034 is a wasteful number, since it uses less digits than its factorization.

21621612535034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4026925.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 21621612535034 in words is "twenty-one trillion, six hundred twenty-one billion, six hundred twelve million, five hundred thirty-five thousand, thirty-four".